A valved introducer sheath is used to facilitate the insertion of a flexible medical device into a body. The elongated valve of the valved introducer sheath is constructed of a foam material that is injected into the sheath and sliced longitudinally to create one or more self-sealing slits through which...http://www.google.fr/patents/US6808509?utm_source=gb-gplus-shareBrevet US6808509 - Valved introducer sheath and related methods
